Add test workflow

.forgejo/workflows/run_tests.yaml

@@ -0,0 +1,26 @@
+name: Test pipeline
+
+on: [push]
+jobs:
+  test:
+    runs-on: docker
+    container:
+      image: python:3
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install -r requirements-dev.txt
+
+      - name: Run tests
+        run: |
+          pytest